H2H data updated: 2026-09-13 00:00 UTC
Klara Koukalova holds a 2–0 lead over Tiantian Sun in their WTA head-to-head. Across 2 main-draw meetings, Klara Koukalova leads 2–0 on hard courts. Most recently, Klara Koukalova won the 2006 Bangkok round of 32 6-4 4-6 6-3.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Klara Koukalova | 6-4 4-6 6-3 | Tiantian Sun | Match data | Oct 12, 2006* | R32 | Bangkok | Tier III → modern equivalent WTA 250 | Hard |
| Klara Koukalova | 0-6 7-6(5) 6-1 | Tiantian Sun | Match data | Sep 30, 2004* | R32 | Guangzhou Open | Tier III → modern equivalent WTA 250 | Hard |
Estimated match date where the exact historical date is unavailable. Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Asterisked totals include editions mapped from documented historical predecessor categories. Mapping details.
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 including documented historical predecessor categories | Finals | 500 including documented historical predecessor categories | 250 including documented historical predecessor categories | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Klara Koukalova | #566 | #20 | 1,860 | 1,803 | 275 | 288 | 48.8% | 0 | 0 | 0 | 0 | 3 | 3 |
| Tiantian Sun | #819 | #77 | 395 | 1,649 | 27 | 54 | 33.3% | 0 | 0 | 0 | 0 | 1 | 1 |
Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.
| Klara Koukalova | Tiantian Sun | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 2001 | 5–4 | 55.6% | #139 | 1,519 | 0 | 0 | 2002 | 0–1 | 0.0% | #231 | 1,493 | 0 | 0 |
| 2002 | 4–5 | 44.4% | #117 | 1,527 | 0 | 0 | 2003 | 2–7 | 22.2% | #129 | 1,451 | 0 | 0 |
| 2003 | 14–19 | 42.4% | #63 | 1,537 | 0 | 0 | 2004 | 2–9 | 18.2% | #126 | 1,429 | 0 | 0 |
| 2004 | 26–23 | 53.1% | #46 | 1,611 | 0 | 0 | 2005 | 7–6 | 53.8% | #105 | 1,520 | 0 | 0 |
| 2005 | 32–19 | 62.7% | #35 | 1,764 | 0 | 2 | 2006 | 12–12 | 50.0% | #81 | 1,628 | 0 | 1 |
| 2006 | 10–22 | 31.2% | #117 | 1,546 | 0 | 2 | 2007 | 3–15 | 16.7% | #230 | 1,505 | 0 | 1 |
| 2007 | 12–12 | 50.0% | #63 | 1,578 | 0 | 2 | 2008 | 1–4 | 20.0% | #281 | 1,493 | 0 | 1 |
| 2008 | 21–22 | 48.8% | #72 | 1,574 | 0 | 2 | — | — | — | — | — | — | — |
| 2009 | 8–17 | 32.0% | #90 | 1,533 | 0 | 2 | — | — | — | — | — | — | — |
| 2010 | 20–20 | 50.0% | #41 | 1,656 | 0 | 2 | — | — | — | — | — | — | — |
| 2011 | 29–25 | 53.7% | #41 | 1,713 | 0 | 2 | — | — | — | — | — | — | — |
| 2012 | 24–22 | 52.2% | #28 | 1,721 | 0 | 2 | — | — | — | — | — | — | — |
| 2013 | 27–25 | 51.9% | #35 | 1,675 | 0 | 2 | — | — | — | — | — | — | — |
| 2014 | 29–27 | 51.8% | #40 | 1,611 | 0 | 3 | — | — | — | — | — | — | — |
| 2015 | 14–22 | 38.9% | #99 | 1,549 | 0 | 3 | — | — | — | — | — | — | — |
| 2016 | 0–4 | 0.0% | #400 | 1,486 | 0 | 3 | — | — | — | — | — | — | — |
Rows are aligned in career order because complete birth data is unavailable. Results cover completed main-draw matches. Bold green marks the higher win percentage when both players have at least 5 matches on that surface at the aligned age.
| Klara Koukalova | Tiantian Sun | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Carpet | Yr | Hard | Clay | Grass | Carpet | ||||||||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | ||
| 2001 | — | — | — | — | 5 | 3 | 8 | 62.5% | — | — | — | — | 0 | 1 | 1 | 0.0% | 2002 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 2002 | 0 | 2 | 2 | 0.0% | 4 | 3 | 7 | 57.1% | — | — | — | — | — | — | — | — | 2003 | 2 | 7 | 9 | 22.2% | — | — | — | — | — | — | — | — | — | — | — | — |
| 2003 | 3 | 6 | 9 | 33.3% | 11 | 11 | 22 | 50.0% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | 2004 | 0 | 6 | 6 | 0.0% | 1 | 2 | 3 | 33.3% | 1 | 1 | 2 | 50.0% | — | — | — | — |
| 2004 | 8 | 12 | 20 | 40.0% | 13 | 9 | 22 | 59.1% | 5 | 2 | 7 | 71.4% | — | — | — | — | 2005 | 7 | 6 | 13 | 53.8% | — | — | — | — | — | — | — | — | — | — | — | — |
| 2005 | 16 | 11 | 27 | 59.3% | 11 | 6 | 17 | 64.7% | 5 | 1 | 6 | 83.3% | 0 | 1 | 1 | 0.0% | 2006 | 10 | 10 | 20 | 50.0% | 1 | 1 | 2 | 50.0% | 1 | 1 | 2 | 50.0% | — | — | — | — |
| 2006 | 4 | 11 | 15 | 26.7% | 4 | 7 | 11 | 36.4% | 1 | 3 | 4 | 25.0% | 1 | 1 | 2 | 50.0% | 2007 | 3 | 8 | 11 | 27.3% | 0 | 5 | 5 | 0.0% | 0 | 2 | 2 | 0.0% | — | — | — | — |
| 2007 | 5 | 7 | 12 | 41.7% | 7 | 5 | 12 | 58.3% | — | — | — | — | — | — | — | — | 2008 | 0 | 3 | 3 | 0.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — |
| 2008 | 6 | 9 | 15 | 40.0% | 15 | 10 | 25 | 60.0% | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2009 | 1 | 7 | 8 | 12.5% | 7 | 9 | 16 | 43.8% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2010 | 12 | 11 | 23 | 52.2% | 5 | 8 | 13 | 38.5% | 3 | 1 | 4 | 75.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2011 | 16 | 15 | 31 | 51.6% | 10 | 7 | 17 | 58.8% | 2 | 2 | 4 | 50.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2012 | 8 | 12 | 20 | 40.0% | 8 | 6 | 14 | 57.1% | 5 | 3 | 8 | 62.5% | 3 | 1 | 4 | 75.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2013 | 17 | 16 | 33 | 51.5% | 7 | 6 | 13 | 53.8% | 2 | 2 | 4 | 50.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2014 | 18 | 17 | 35 | 51.4% | 4 | 6 | 10 | 40.0% | 6 | 3 | 9 | 66.7% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2015 | 5 | 14 | 19 | 26.3% | 6 | 5 | 11 | 54.5% | 3 | 3 | 6 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2016 | 0 | 4 | 4 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 119 | 154 | 273 | 43.6% | 117 | 101 | 218 | 53.7% | 32 | 24 | 56 | 57.1% | 7 | 9 | 16 | 43.8% | Career | 22 | 41 | 63 | 34.9% | 3 | 9 | 12 | 25.0% | 2 | 4 | 6 | 33.3% | — | — | — | — |
Rows are aligned in career order because complete birth data is unavailable. Detailed serve and return statistics available for 66/96 of Klara Koukalova's and 28/56 of Tiantian Sun's main draw matches. Sample is shown as matches with detailed serve and return statistics / total main draw matches. Bold green marks the stronger value when both stat samples contain at least 5 matches; lower is better for DFs/M.
| Klara Koukalova | Tiantian Sun | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% | Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% |
| 2014 | 31/56 | 1.8 | 5.0 | 55.4% | 61.0% | 41.7% | 47.6% | 48.1% | 51.9% | 43.5% | 2003 | 1/9 | 1.0 | 4.0 | 59.4% | 60.5% | 30.8% | 28.6% | 28.6% | 48.4% | 40.0% |
| 2015 | 31/36 | 0.7 | 5.5 | 55.6% | 60.9% | 46.7% | 43.3% | 48.1% | 54.4% | 42.6% | 2006 | 9/24 | 1.1 | 1.2 | 67.2% | 58.1% | 44.5% | 53.0% | 49.3% | 53.8% | 37.5% |
| 2016 | 4/4 | 0.3 | 7.3 | 56.6% | 57.9% | 44.2% | 56.5% | 65.5% | 52.2% | 36.5% | 2007 | 14/18 | 1.6 | 2.1 | 65.0% | 55.8% | 43.0% | 44.6% | 35.3% | 51.3% | 40.4% |
| — | —/— | — | — | — | — | — | — | — | — | — | 2008 | 4/5 | 1.5 | 3.0 | 65.6% | 55.4% | 41.8% | 51.8% | 30.6% | 51.0% | 36.8% |
| Career | 66/563 | 1.2 | 5.4 | 55.5% | 60.8% | 44.2% | 46.1% | 49.2% | 53.1% | 42.7% | Career | 28/81 | 1.4 | 2.0 | 65.6% | 56.6% | 42.8% | 47.8% | 38.8% | 52.0% | 38.9% |
Rows are aligned in career order because complete birth data is unavailable. Metrics use eligible main-draw results; point statistics use matches with detailed data. Bold green marks the stronger value when both underlying samples are sufficient. Lower is better for Schedule because a negative value means a tougher schedule. Career Schedule is normalized per 100 matches.
| Klara Koukalova | Tiantian Sun | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule |
| 2001 | 1520 | 104.0 | — | — | — | — | — | +55 | — | 47.8% | +0.26 | 4–1 (80%) | 0–1 | — | +1.03 | 2002 | 1493 | 101.5 | — | — | — | — | — | — | — | 33.3% | -2.00 | 0–1 | — | — | -0.19 |
| 2002 | 1527 | 105.4 | — | — | — | — | — | +71 | — | 50.0% | -0.42 | 2–4 (33%) | 1–0 | — | +0.68 | 2003 | 1451 | 101.0 | -0.20 | -1.27 | 0.776 | 43.9% | +17 | — | — | 22.2% | -1.67 | 0–2 | 1–2 (33%) | — | +0.54 |
| 2003 | 1537 | 119.8 | — | — | — | — | -60 | +108 | — | 44.4% | -0.35 | 7–8 (47%) | 1–3 (25%) | 99.1 | +0.56 | 2004 | 1430 | 103.5 | — | — | — | — | -34 | +118 | — | 24.0% | -1.68 | 1–2 (33%) | 1–1 | — | -0.02 |
| 2004 | 1612 | 117.6 | — | — | — | — | -110 | +85 | +30 | 49.5% | -0.07 | 8–7 (53%) | 6–4 (60%) | 103.5 | +0.67 | 2005 | 1520 | 124.6 | — | — | — | — | -19 | — | — | 57.7% | +0.69 | 1–1 | 3–1 (75%) | — | +0.62 |
| 2005 | 1764 | 126.4 | — | — | — | — | -90 | +7 | -18 | 55.5% | +0.09 | 15–4 (79%) | 9–2 (82%) | 118.0 | +1.13 | 2006 | 1629 | 131.4 | -1.14 | -2.98 | 0.811 | 45.8% | -16 | — | — | 52.7% | -0.04 | 2–5 (29%) | — | — | -0.16 |
| 2006 | 1547 | 107.1 | — | — | — | — | +14 | +77 | +135 | 37.0% | -1.05 | 2–7 (22%) | 3–3 (50%) | 92.0 | +0.20 | 2007 | 1505 | 100.0 | -2.48 | -2.77 | 0.830 | 45.9% | +49 | -23 | — | 20.5% | -2.13 | 1–2 (33%) | 4–1 (80%) | 101.7 | -1.14 |
| 2007 | 1579 | 115.5 | — | — | — | — | -13 | +59 | — | 50.0% | +0.06 | 3–5 (38%) | 3–4 (43%) | 98.3 | +0.21 | 2008 | 1494 | 101.6 | -1.21 | -2.08 | 0.750 | 43.9% | +30 | — | — | 30.8% | -1.62 | 1–2 (33%) | 2–3 (40%) | 98.7 | +0.02 |
| 2008 | 1574 | 111.3 | — | — | — | — | -45 | +84 | — | 48.5% | -0.08 | 10–9 (53%) | 3–5 (38%) | 100.5 | +0.48 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2009 | 1534 | 110.3 | — | — | — | — | -72 | +97 | — | 35.0% | -0.95 | 5–5 (50%) | 4–5 (44%) | 100.5 | -0.40 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2010 | 1657 | 126.4 | — | — | — | — | -49 | -66 | +4 | 46.2% | -0.20 | 10–5 (67%) | 5–6 (45%) | 106.2 | +0.89 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2011 | 1713 | 131.7 | — | — | — | — | -15 | -60 | -54 | 50.4% | -0.03 | 13–6 (68%) | 7–4 (64%) | 109.2 | +0.80 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2012 | 1721 | 128.0 | — | — | — | — | -45 | -9 | -3 | 51.0% | +0.17 | 10–6 (63%) | 5–7 (42%) | 103.3 | -0.68 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2013 | 1676 | 139.6 | — | — | — | — | -9 | +65 | +31 | 51.7% | +0.15 | 9–9 (50%) | 6–9 (40%) | 95.7 | -1.87 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2014 | 1612 | 127.9 | -2.87 | -0.03 | 0.906 | 47.8% | +13 | +61 | +151 | 50.8% | -0.13 | 10–8 (56%) | 11–4 (73%) | 104.3 | -0.55 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2015 | 1549 | 110.8 | -2.79 | +1.36 | 0.935 | 48.1% | -28 | +101 | +170 | 40.5% | -0.84 | 2–6 (25%) | 3–4 (43%) | 95.0 | -0.51 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 2016 | 1486 | 101.6 | -2.24 | -1.27 | 0.765 | 45.0% | -28 | — | — | 27.3% | -1.55 | 0–3 (0%) | 0–1 | — | +0.16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1804 | 125.9 | -2.79 | +0.55 | 0.910 | 47.8% | -34 | +51 | +56 | 47.9% | -0.19 | 110–93 (54%) | 67–62 (52%) | 106.6 | +0.50 | Career | 1650 | 117.9 | -1.79 | -2.69 | 0.810 | 45.5% | 0 | +30 | — | 37.4% | -0.93 | 6–15 (29%) | 11–8 (58%) | 98.4 | -0.41 |
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Anabel Medina Garrigues | 5 | 6 | 11 | Mar 20, 2013 | H2H |
| Lucie Safarova | 6 | 4 | 10 | Aug 7, 2013 | H2H |
| Flavia Pennetta | 4 | 5 | 9 | Aug 21, 2014 | H2H |
| Maria Kirilenko | 3 | 5 | 8 | Sep 19, 2014 | H2H |
| Samantha Stosur | 2 | 5 | 7 | Jul 24, 2015 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Virginie Razzano | 0 | 3 | 3 | Feb 20, 2008 | H2H |
| Gisela Dulko | 0 | 3 | 3 | Aug 8, 2007 | H2H |
| Victoria Azarenka | 1 | 1 | 2 | Apr 17, 2008 | H2H |
| Anastasia Rodionova | 1 | 1 | 2 | Mar 6, 2008 | H2H |
| Martina Hingis | 0 | 2 | 2 | Sep 20, 2007 | H2H |